Philadelphia police have released surveillance photos of a suspect who stabbed a 7-Eleven employee in Center City after an argument over cigarettes.

It happened around 6:20 a.m. Sunday at the convenience store on the 1300 block of Market Street.

Police say the suspect walked into the store and asked for cigarettes.

As the 58-year-old clerk started to bag a pack of cigarettes, police say the suspect then asked for five additional packs.

The clerk told the suspect the price of the additional cigarettes.

Police say that's when the suspect pulled a large knife from his pants pocket and attempted to stab the clerk in the head.

They say the suspect then jumped on the counter and stabbed the clerk in the head, neck and shoulder area.

According to police, the two wrestled with each other during the attack.

The clerk was able to knock the suspect off the front counter to the floor.

The suspect dropped his black hooded jacket and knife on the floor.

Police say he then ran from the store without taking any items or money.

The clerk was transported to Hahnemann University Hospital for treatment. He is listed in stable condition.

The suspect is described as a black male, 45 to 50 years old, 6' tall, thin build, dark complexion, with a beard. Police say he appears to be homeless. He was wearing a dark shirt with white vertical stripe down the arm sleeves, blue jeans, and black and white sneakers.